Steam-engine



(No Model.) 2 Sheets-Sheet 1.

0.. A. SMITH STEAM ENGINE.

Patented Apr. 16, 1889 (No Model.) 2- Sheets-Sheet 2.

O. A. SMITH.

STEAM ENGINE.

No. 401,386. Patented Apr. 16, 1889.

.provement in Cut-0d Valves for Steam-Engines, of which the following is a specificasist-s in the peculiar construction and combi- UNITED STATES PATENT FFICE.

CHARLES A. SMITH, OF DRESDEN, NEW YORK.

STEAM-=ENGINE.

dated April 16, 1889.

Application filed May 15, 1888. Serial No. 273,926. (No model.)

To all 2072,0122] it may concern.-

Be it known that I, CHARLES A. SMITH, a citizen of the United States, residing at Dresden, in the county of Yates and State of New York, have invented a new and useful Imtion.

My invention relates to an improvement in cut-off valves for steam-engines; and it connation of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a vertical longitudinal sectional view, partly in elevation, of a steam-engine embodying my improvements. Fig. 2 is a similar view taken on a difierent plane. Fig. 3 is a transverse sectional view taken on the line a; a; of Fig. 1. Fig. i is a detached perspective view of one of the oscillating valves. Fig. 5 is a detail view of the inner valve.

A represents the cylinder of the usual construction, and 13 represents the steam-chest. Arranged transversely in the ends of the steam-chest are tapered valve seats or openings C, which communicate with an exhaustopening, D, through channels E, and communicate with the interior of the steam-chest and with the ends of the steam-cylinder through channels G represents the usual piston, which is arranged in the cylinder. II represents the piston-rod.

I represents a pair of tapered turning plugs or valves, which are seated in the openings 0, are each provided at one end with a stem, K, and have a stud, L, at their opposite end. The stems K extend through packingboxes M in one side of the steam-chest, and the studs L are fitted in countersunk recesses N in the opposite side of the steam-chest.

O represent-s adjusting plates, which bear against the outer end of the studs L, and are secured in contact therewith by means of adjusting-screws P.

Each valve I is provided on one side with a channel or way, R, and is provided on the opposite side with a converging channel or way, S. Said channels or ways are adapted to alternately establish and to out off communication between the inlet and exhaust channels of the cylinder when the valves are oscillated, as will be hereinafter described.

.In the center of each valve I is a longitudinal cylindrical bore, T, which extends through the stem K. Arranged in the bore of each valve is a regulating cylindrical turning plug or valve, T, which has a projecting stem, U, at one end that passes through and extends beyond the sleeve or stem K of the valve. Said regulating-valves T, are each provided with a transverse channel, V, which is adapted to communicate with or to cut ofli a similar transverse channel, \V, in the valve 1.

To the outer end of the stem K of each valve I is secured an arm, X. The outer ends of said arm are connected by a rod, Y, which has its ends pivot-ally secured thereto, as shown.

Z represents the standard of the governor, in which is journaled the usual vertical revoluble shaft, A, having the weighted arms B, and 0 represents the usual sleeve or collar, which is arranged on the shaft A", and is adapted to move in a vertical direction thereon and to rotate therewith. Said sleeve or collar is connected to the weighted arms B by means of links D.

E represents a rocking arm, which is pivoted on one side of the base of standard Z, as at F.

G represents a rod which connects said rocking arm to the usual eccentric of the engine, (not shown,) and II represents a pitman or rod which connects the upper end of the arm 'E to the connected arms of the valves I.

From the foregoing description it will be understood that when the engine is in operation the valves I will be oscillated or partly to be operated in the seats or recesses C with a minimum degree of friction and with a minimum expenditure of power.

The object of my invention is to provide means for automatically controlling the amount of live steam,which is alternately fed to the ends of the cylinder, and thereby regulate the speed of the piston. To this end I employ the regulating-valves T, hereinbefore described, connect an arm, I, to the projecting stem of one of the valves, and an arm, K, to the projecting stem of the other regulating-valve, centrally pivot a rocking lever, L, to the standard Z, connect the upper end of said lever to the arm I by means of a rod, M, and connect the lower end of said lever to the arm K by means of a rod, N. A suitable link, 0', is also provided to attach the arm L to the vertically-movable sleeve or collar 0' of the governor, whereby the said regulatingvalves are operated automatically by the governor, so as to regulate the admission of steam to and consequently regulate the speed of the engine.

Having described my invention, I claim 1. The combination, in a steam-engine, of the cylinder having the exhaust-opening D, the channels E, and ports F, with the steamchest having the recesses O, communicating with the said ports and channels and with the interior of the chest, and the oscillating valves arranged in the recesses O and having the channels S R,for the purpose set forth, substantially as described.

2. The combination, in. a steam-engine, of

the cylinder having the steam-chest, the recesses O and the inlet and exhaust ports com municating therewith, and the oscillating valves I, arranged in the recesses C and having the converging channels W R on opposite sides, and the transverse channels S, connecting the same, substantially as described.

3. The combination, in a steam-engine, of the cylinder having the steam-chest, the recesses C and the inlet and exhaust ports communicating therewith, the oscillating valves I, arranged in the recesses O and having the converging channels IV R on opposite sides, and the transverse channels S, connecting the same, and the arms X, attached to the valves, and the link connecting said arms, whereby the valves are caused to operate in unison, substantially as described.

4. In a steam-engine, the combination of the valves 1, having the central longitudinal bores, the transverse channels S, and the conveying-channels W R on opposite sides, communicating with channels S, the valves T, arranged in the bores of valves I and having the transverse channels V, means, substantially as set forth, to oscillate the valves I, the governor and connections between the same, and the valves T, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

CHARLES A. SMITH.

Witnesses:

JOHN T. KNOX, LEWIS SWARTHOUT. 

